ALFATH, J. PENINGKATAN MOTIVASI BELAJAR PESERTA DIDIK MELALUI PROBLEM BASED LEARNING PATA MATA PELAJARAN BIOLOGI KELAS X SMAN 1 KETUNGAU HULU. SECONDARY: Jurnal Inovasi Pendidikan Menengah , [S. l.], v. 3, n. 1, p. 47-53, 2023. DOI: 10.51878/secondary.v3i1.1943. Disponível em: https://mail.jurnalp4i.com/index.php/secondary/article/view/1943. Acesso em: 8 jan. 2025.